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SashaP
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35
Crux of Dwork's proof of rationality of the zeta function?
Sep 10, 2016
question
32
Etale cohomology can not be computed by Cech
Sep 23, 2016
question
24
Is the $H$-space structure on $S^7$ associative up to homotopy?
Dec 3, 2016
answer
17
Commutative ring $R$ with no nontrivial idempotents, with a localization $R_r$ with infinitely many idempotents
Apr 21, 2020
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15
Lower central series quotients in terms of (co)homology
Apr 17, 2016
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14
Local proof of Grothendieck-Riemann-Roch theorem
May 21, 2016
answer
12
Question on the Sato-Tate conjecture
Oct 10, 2016
answer
12
Are "large enough" finite etale covers arithmetic?
Jun 27, 2020
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11
Printing omission in Mumford's "Lectures on Curves on an Algebraic Surface"
Dec 1, 2016
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11
Can non-split extension be isomorphic to the split one as objects
Nov 17, 2020
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14
Show that a field extension $L/K$ is separable iff the trace form is non-degenerate.
8
Any hyperelliptic curve is never a complete intersection.
5
Metric limit and limit in category
5
Quadratic field, $O_K/\mathfrak{p} = \mathbb{F}_p$, $O_K/pO_K$ is a finite field of order $p^2$.
5
Zeta function, $\mathbb{F}_5[T, \sqrt{T(T-1)(T+1)}]$